Coin bank



FIG. 1 is a front perspective view of a coin bank;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, of which the left side elevational view is a mirror image thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken line showing of portions of a plastic cover of the coin bank is included for the purpose of illustrating environmental structure and forms no part of the claimed design. 

The ornamental design for a coin bank, as shown and described. 